This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SN65HVS885: SN65HVS885 RE delay

Part Number: SN65HVS885

1. HVS885 IPx and REx relationship? I will take a ground resistance to generate a square wave, input to Mcu to do counter.
Explain:

a. In order to have an output waveform on REx, there will be a R connect to group . It will be affect Ilim?

b.  IPx enters a PWM 10/90 % duty cycle. How much difference will I get in the REx waveform?

2. Will REx be the same speed as IPx?
Exp: How long does Rex have Delay IPx?

  • Hi user4786735,

    When IPx pin toggles, internally there is a feedback that will turn on the switch for REx pin LED outputs to turn high.

    On the cucrrent limit, I am assuming you meant R connected to ground? The Ilim changes will be affected by the Rilim value placed in your design per equation below:

    We do not have IPx to REx delay time information available. What is your application scenario, and coud you please advise why is this time delay important for your application?

    Thank you-

    Helen

  • Hi Helen

     What is your application scenario, and coud you please advise why is this time delay important for your application?

    I have PWM(24V) in IPx, I wnat to get same PWM in REx(3.3V) to do counter.

    Shawn

  • Hi user4786735,
    Unfortunately the time delay information is not available at this time. If you could provide your set up/schematics information, then I can order parts and evaluation board to perform this test.

    Thank you,
    Helen